Shaving implement



` aand Ma.11,1941

.lohn 'W'. Lynch, hicago, lll., assior to hicago Flexible Shaft Company, hicago, lll., a corporation ci Illinois Application November dit, luid, Serial lilo, tuflli V5 hlai,

"llhis invention relates to shaving implements ol the type lrnown asfdry Shavers and has more particular reference to the construction ci the sinn-engaging shearing member commonly ii lrnovvn as the comb My invention refers to that type/oi comb unit which comprises a shearing member or thin sheet metal reinforced by a supporting trame. The thin shearing member m the inner edges oi which constitute cutting or shearing edges in cooperation with a movable cutter. The shearing member is oi such thinness that it does not have sufcient rigidity to y be seit-sustaining irioperation and prior to my present invention a slreleton supporting frame has been provided to which the thin shearing member isconiormed and imited. This trame supports the thin shearing member in the desired shearing relation to the movable cutter. also, in the till and the supporting trame constitute a replaceable unit well adapted lor quiclr removal and replacement. This unit, because oi its construcm tion, promotes greater' accuracy and precision in the location or its shearing edges in relation to the movable cutter and thereby improves the cutting qualities in an implement of this lrind.

.il diincult problem is presented in supporting the shearing member so that the thin resilient portion having the cutting edges will be held with accuracy and precision in relation to the movable cutter. This diitlculty is remediedv in the present invention, one oi the objects ci' which is to provide improved means for positively clamping and interlocking the thin resilient member to the slreleton4 trame without the intervention oi any connecting medium such as is ern- .ployed withv soldering or bracing. By this means the thin shearing member will maintain its 'position indefinitely and the danger or such memn ber becoming loosened or detached from its trarne is avoided. This also avoids certainl dimculties incidental to soldering and bracing methods.

.another object of my invention is to provide a structure of the character described in which the thin shearing member is positively clamped and interloclred to the supporting :frame by means oi swaging or riveting the metal oi the Yone of said members over vthe other.

another object of my invention is to provide a structure of the character described in which the swagingor riveting serves to draw or stretch the thin shearing member tightly against the suriaccs ol the supporting frame on'which lt is 55 seated-to thereby accurately conform the thin is periorated to provide hair-receiving openings,`

preierred embodiment, the thin shearing memberv ici. sc-ni member to the shape oi said supporting surfaces and permanently retain it v'in such shape.

.another object of my invention is to improve the construction oi the comb unit by applying the uniting means, such as swaging, riveting, welding, or the lilre, at localized points in alignment with the supporting ribs ci? the trarne whereby to avoid distortion stresses onthc thin shearing member.

.another object of my invention is to provide improved means lor uniting the thin shearing member and the supporting trame with the view to promoting greater economy in the cost of manufacture ol these parts.

.ilnother object oi my invention is to improve the construction or" the thin shearing member and the supporting trame as a replaceable unit by the provision oi mechanical means for positively clamping and interlocking the thin shearing member to the irame. f

llthile my improvements may be constructed in any or various ways, Il have here shown, for

purpose oi illustration, a single embodiment.

l-Tteierrlng to the drawing:

liifg. l is a iragmentary sectional view on an enlarged scale ci a shearing implement embodying my invention;

Fig. 2 is a fiat development view of the thin shearing member and the supporting frame riveted together; Y

3 is a cross-section through the comb unit which comprises the supporting :trame and the thin shearing member riveted thereto in accordance with my invention;

llig. l is a side elevation oi the comb unit with a portion ol the thin shearing member broken away to show the supporting trarne in elevation;

Fig. 5 is an enlarged fragmentary vertical section through one oi the extruded rivets; and

liig. d is a similar view showing the thin shearing member applied and the rivet swaged over.

lvly improvements are preferably, but not necessarily, applied in a replaceable shearing unit at one end oi a handle housing which serves to house the mechanism lor operatirm the movable cutter. This mechanism usually includes a small electric motor, but other driving means may be used. ln the drawing the handle housing and the motor have been omitted and l have shown only the replaceable shearing unit embodying the subject matter ci my invention, together .with r means lor supporting and holding said unit in operative position and a movable cutter cooperating vvith the thin shearing member oi the unit.

In the preierredembodiment the supporting frameparftfcoiisistsof longitudinal members Il i ting. These perforate and I2 in spaced parallel relation joined at their ends by curved ribs I 3 and I l and intermediate their ends by one or more similarly curved ribs I5. This constitutes a skeleton frame having the desired shape characteristics to which the thin shearing member or plate, designated-generally by I5, is united. The surfaces of lthe frame on which the thin shearing member is supported, as well as the surfaces which locate and support the unit on .the casing or main structure of the shaver, are formed or finished to a high degree of precision in order to accurately position the shearing 'edges in cooperation with the movable cutter. The unit may be suitably supported, as for example on a casing structure having-side walls Il and end walls IS (only one of which is here shownl.- In Athis instance Ithe unit is removably held in the operative position shown by means of lingers I9 which engage in sockets 2| in the longitudinal frame members II and l2 and clamp the unit down in working ypOtSiltion on the casing structure. Upon withdrawing the iingers I9 the unit may be removed for cleaning, replacement and similar purposes.

The shearing member i S is of .thin sheet metal, preferably sheet steel which has been .tempered so as to provide fthe desired edge-holding propf provide cutting edges. used sheets oi different' erties when perforated Ito In actual practice I have thicknesses, ranging from about .002" to .004". My present invention is these dimensions. The sheet or Aplate I6 is the skin-engaging part of the shearing implement and it is perforated to provide hair-receiving openings, the inner edges of which constitute shearing or cutting edges. These perforations maybe of any suitable or preferred form. As shown, .the perforations are arranged in the areas different type of opening, including a tooth formation particula'ly adapted for long hair cutareas are separated by imperforate areas 2t which overlie and rest upon the ribs I5 of the supporting frame. The larger perforations 25 in Irows along .the longitudinal edges and adapted for relief or discharge of the continuity of .the imperforate portions 2e which extend to the, marginal portions of the thin plate. embodiment of my invention I porting frame at localized .points on .fthe longitudinal members. This construction may be in the form of swaging, riveting, welding, or the like, between the .two metal pants.

The rivets are locatedA adjacent to the ends of' the arched ribs I3, I4 and I5, substantially in alignment therewith. The thin plate is perforated along its longitudinal marginal pontions to rivet is formed in theextruding step Ito provide a depressed center 29 and yan annular periphery Furthermore, in diameterl than its complemental rivet so that not, however, confined toyconnected by curved ribs, each Atuwdhia'l members, and a opening 21 is slightly larger when the plate is assembled on ythe frame with..V the rivets projecting through the holes there vlll be a slight but appreciable clearan between the periphery ofthe rivets/andthe inside walls of the holes. The partsare of such dimensions and so proport ned that when the rivet heads are swaged over the plate each rivet at its lower side will engage the lower wall of the plate opening 2li and exert downwardpressureagainst .the plate toVV VdrawVorHstretc/it surfaces of the ribs but without setting up distortion stresses in the this construction there i's slight clearance between the periphery of the rivet and the hole in the tightly againsiwt-he` outer 10 plate. As a .cons equepceiofd plate at the upper side of fthe rivet, as shown at 15 32 in Fig. 6. By reason of Ithis construction the thin plate is posi-tively clamped and interlocked to the longitudinal members ofthe frame and rthe perforated shaving area of the plate is conformed to the accurately finished ribs and permanently retained thereon. Furthermore, it will be observed that :the arched ribs are positioned in comparatively close relation so as to give substantial support `to the perforated areas and thereby retain them in a determined shape conforming with the cutting edge of the movable cutter.V or the :path of travel thereof, as the case may be, depending on .the type of shaving implement with which my invention is used.

surfaces of the arched 20 In the type here shown, a movable cutter co- 30 operates with the inner side of the thin shearing plate and is rapidly moved across the same in a cutting action. In` the present example a il-at cutter 33 is supported by a holder 34 which in turn is mounted in bearings in the end walls I8 to oscillate about the center thereof. Such oscillations are imparted by an eccentric pin 35 carried by a driving member 36 which in turn may be driven by an electric motor in the handle of .the housing Iabove mentioned, or by any suitable motive power.

While I have shown a particular embodiment of my invention, it will be understood that I do not wish .to be limited thereto since many modifications may vbe made, and I therefore contemplate by the appended claims to cover any such modiiications as fall within .the true spirit 'and scope of my invention.

I claim:

1. A shaving implement comprising a supporting frame of metal having longitudinal members connected by a series of spaced ribs, a thin resilient shearing plate conforming to the shape of said ribs and having edges extending over the longitudinal members of the frame, a series of rivets extruded from'a. side of each longitudinal member and swaged over said edges of the plate, the rivet bodies being swaged off center in a direction to exert a pull on the plate to draw it against the ribs and positively clamp it to the frame, and a cooperating movable shearing member.

2. A shaving implement comprising a supporti ing frame of metal having longitudinal members longitudinal member having a series of rivets extruded from its outer side, a thin resilient shearing plate conforming to the curvature of said ribs and extending at its edges into proximity to the longitudinal members of the frame, the plate having perforations adjacent to its said edges positioned to receive said rivets, the rivets being swaged over the plate positively clamping it to said longilcooperating movable shearing member.

3. A shaving implement comprising a supportcurved ribs, and a. cooperating movable shearing member.

4. A shaving implement comprising a supporting frame of metal having longitudinal members connected by a series of spaced ribs, a thin resilient shearing' plate lconforming to the shape of said ribs and having edges extending over the longitudinal members of the frame, said plate having imperforate portions overlying the ribs and a. perforated portion intermediate adjoining imperforate portions, a series of rivets extruded from a side of each longitudinal member, each rivet positioned substantially in alignment with an imperforate portion and swaged over said edges of thev plate for positively clamping and interlocking the plate to the frame without imposing distortion stresses on the perforate portions, and a cooperating movable shearing member.

5. A replaceable comb unit for a shaving implement comprising a. supporting frame of metal having longitudinal members connected by curved ribs. each longitudinal member having a series of rivets extruded from its outer side, and a thin resilient shearing plate conforming to the curvature of said ribs and extending over the longitudinal members,-the plate'v having perforatlons positioned to receive said rivets, the rivets being swaged over the plate positively clamping it to said longitudinal members.

t JOHN W. LYNCH. 

